The Happy Seal halves a random peg twice without actually lowering the peg's number.
Tardigrade has a 60% chance to double a random peg when a peg is halved.
The alien saucer thing (sorry idr what it's called. it's from the black market) sends out a circular pulse every second time a peg is halved. When the pulse hits a peg, it pops it twice.
These three combined create a loop that endlessly "halves" (but doesn't actually lower the number) the pegs, which then causes both the pulses and causes random pegs to be doubled. And then since the pulses pop the pegs, they trigger the "halving" again, and on and on
https://www.youtube.com/watch?v=R1fU81Ro_bc
Here's a clip of this build at the end boss. Unfortunately it was blood rain. I wanted to see how it does against the lasers. But either way, as long as Nubby bounces a couple times, it doesn't matter what happens after that. The round won't end until I press End